Takara Corporation Limited

Takara Co., Ltd.

Yoshito Nihira

Takahiro Itou

Kenji Imamura

A magnetophoretic display panel capable of displaying clear and distinct indicia and erasing the indicia neatly. The display panel includes a multi-cell structure having a thickness of 0.8 to 1.5 mm and formed with a number of cells which contain therein colored liquids and colored magnetic particles. A magnetic pen exhibits an effective magnetic flux density of 100 to 500 Gauss at a bottom of a magnetic panel when positioned on a surface of the magnetic panel. An erasure magnet exhibits an effective magnetic flux density of 300 to 1500 Gauss at the surface of the magnetic panel when positioned on the bottom of the magnetic panel.

Magnetophoretic display panel

A magnetophoresis type display device is provided with a transparent front panel sheet, a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it, and a partitioning member is between the front panel sheet and the back panel sheet for partitioning the sealed space into a large number of cells, where a liquid dispersion containing magnetic particles is sealed inside the cells formed by partitioning by the partitioning member.

Magnetophoresis type display device and process of production of same

A magnetophoresis type display device, according to one embodiment, is provided with a transparent front panel sheet, a back panel sheet arranged with respect to the front panel sheet so as to form a sealed space with it, a partitioning member provided between the front panel sheet and the back panel sheet for partitioning the sealed space into a large number of cells and a liquid dispersion containing magnetic particles and a single-color fluid to be sealed inside the cells formed by partitioning by the partitioning member. The single-color fluid is a white fluid that includes at least titanium oxide and silicon oxide in which when the total weight of the white fluid is 100 wt %, the wt % of the titanium oxide in the white fluid is C, and the wt % of the silicon oxide is D, the weight ratio C/D is in the relationship of 1&lE;C/D&lE;2.5.

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Tokyo, Japan

Yoshito Nihira